What type of framework is Micrometer?

Micrometer is recognized as an open-source instrumentation framework designed to facilitate application metrics collection. This framework provides a simple and effective way to instrument Java applications, enabling developers to expose metrics in a vendor-neutral manner. It acts as a façade for various monitoring systems, such as Prometheus, Graphite, and Datadog, allowing for seamless integration and flexibility in choosing a monitoring backend.

The advantages of Micrometer being open-source include community support, extensive documentation, and continuous updates that come from contributions by developers worldwide. Its design focuses on being lightweight and efficient, making it suitable for a wide range of applications, particularly in microservices architectures.

This clarity about its purpose as an instrumentation framework distinguishes Micrometer from frameworks that are proprietary, project management-centric, or purely performance monitoring tools. Other options do not capture the essence of Micrometer's functionality and its position within the observability ecosystem accurately.